Ingredients for - German-Style Mushroom Sauce

1. Butter, or to taste 1 tablespoon
2. Onion, diced 1 medium
3. Mushrooms, thickly sliced 10
4. Water, or as needed 2 tablespoons
5. Beef bouillon 1 teaspoon
6. Cooked bacon 2 slices
7. Sour cream ½ cup
8. Cornstarch 1 tablespoon

How to cook deliciously - German-Style Mushroom Sauce

1 . Stage

Melt butter in a skillet over medium heat. Stir onion and mushrooms into melted butter. Reduce heat to low and cover the skillet. Cook for 15 minutes. Stir, cover again, and cook until tender, about 15 minutes more.

2 . Stage

Pour enough water into the skillet to moisten onion-mushroom mixture. Add bouillon; stir until dissolved. Cut bacon into small pieces over sauce. Simmer, uncovered, for 10 minutes.

3 . Stage

Increase heat to medium. Add sour cream and cornstarch; stir constantly until sauce is blended and thickened, about 2 minutes.